Online Measurement of Lubricating Film Thickness in Slider-on-Disc Contact Based on Dichromatic Optical Interferometry

2017 ◽  
Vol 65 (4) ◽  
Author(s):  
Qinghua Bai ◽  
Feng Guo ◽  
Pat Lam Wong ◽  
Peigang Jiang
Keyword(s):  
Film Thickness ◽  
Optical Interferometry ◽  
Online Measurement ◽  
Lubricating Film ◽  
Lubricating Film Thickness

Determination of thin hydrodynamic lubricating film thickness using dichromatic interferometry

2014 ◽  
Vol 53 (26) ◽  
pp. 6066 ◽  
Author(s):  
L. Guo ◽  
P. L. Wong ◽  
F. Guo ◽  
H. C. Liu
Keyword(s):  
Film Thickness ◽  
Lubricating Film ◽  
Lubricating Film Thickness

Prediction of transient lubricating film thickness in knee prostheses with compliant layers

1998 ◽  
Vol 212 (3) ◽  
pp. 157-164 ◽  
Author(s):  
Z M Jin ◽  
D Dowson ◽  
J Fisher ◽  
N Ohtsuki ◽  
T Murakami ◽  
...  
Keyword(s):  
Knee Joint ◽  
Film Thickness ◽  
Elastohydrodynamic Lubrication ◽  
Contact Radius ◽  
Knee Prostheses ◽  
Stroke Length ◽  
Additional Advantage ◽  
Lubricating Film ◽  
Theoretical Predictions ◽  
Lubricating Film Thickness

The transient lubricating film thickness in knee prostheses using compliant layers has been predicted under simulated walking conditions based upon the elastohydrodynamic lubrication theory. Qualitative agreement has been found between the present theoretical predictions and the experimental measurements using an electric resistance technique reported earlier. It has been shown that the contact geometry plays an important role in the generation of fluid film lubrication in knee prostheses using compliant layers. The maximum lubricating film thickness is predicted for the maximized contact area of a transverse conjunction where the semi-minor contact radius lies in the direction of entraining. The additional advantage of the transverse contact conjunction is that the possibility of lubricant starvation due to small stroke length can be minimized. All these factors, together with the kinematic requirements in the natural knee joint, should be taken into consideration when designing artificial knee joint replacements.

scholarly journals Estimation of appropriate lubricating film thickness in ceramic-on-ceramic hip prostheses

2016 ◽  
Author(s):  
M. Tauviqirrahman ◽  
Muchammad ◽  
A. P. Bayuseno ◽  
R. Ismail ◽  
E. Saputra ◽  
...  
Keyword(s):  
Film Thickness ◽  
Hip Prostheses ◽  
Lubricating Film ◽  
Ceramic On Ceramic ◽  
Lubricating Film Thickness

Prediction of lubricating film thickness in UHMWPE hip joint replacements

2001 ◽  
Vol 34 (2) ◽  
pp. 261-266 ◽  
Author(s):  
D. Jalali-Vahid ◽  
M. Jagatia ◽  
Z.M. Jin ◽  
D. Dowson
Keyword(s):  
Film Thickness ◽  
Hip Joint ◽  
Joint Replacements ◽  
Lubricating Film ◽  
Hip Joint Replacements ◽  
Lubricating Film Thickness

MAPPING OF LUBRICATING FILM THICKNESS IN HUMAN HIP JOINT REPLACEMENTS

2012 ◽  
Vol 2012 (04) ◽  
pp. 378-381 ◽  
Author(s):  
Dalibor Bosak ◽  
Jan Lastuvka ◽  
Martin Vrbka ◽  
Tomas Navrat ◽  
Martin Hartl ◽  
...  
Keyword(s):  
Film Thickness ◽  
Hip Joint ◽  
Joint Replacements ◽  
Lubricating Film ◽  
Hip Joint Replacements ◽  
Lubricating Film Thickness

Operating Characteristics of an Externally Pressurized Gas Lubricated Piston Ring

1995 ◽  
Vol 117 (3) ◽  
pp. 534-539 ◽  
Author(s):  
Minoru Yamamoto ◽  
Haruo Mori ◽  
Tsuneo Yoshikawa
Keyword(s):  
Film Thickness ◽  
Piston Ring ◽  
Reynolds Equation ◽  
Narrow Range ◽  
Operating Characteristics ◽  
Lubricating Film ◽  
A Cell ◽  
Cylinder Bore ◽  
Raphson Iteration ◽  
Lubricating Film Thickness

An analytical model is presented to obtain the film thickness profile of an externally pressurized gas lubricated piston ring which is applied to an air compressor. In order to examine the effects of the ends of the ring, the analysis is based on the two-dimensional, transient, compressible Reynolds equation accounting for the ring deflection and the equilibrium condition of the ring in the clearance space between the piston and the cylinder bore. In the numerical simulation, the Reynolds equation is discretized by using a cell method. The resulting nonlinear system of equations is solved by the Newton-Raphson iteration method. The obtained results show that the piston ring keeps the lubricating film thickness within a narrow range of the design clearance over the entire circumferential area throughout one cycle of compressor operation.

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